It's free, every week, in your inbox. Sign up now! The ST40 is a spherical tokamak, a circular-shaped fusion reactor that uses giant magnets to confine superhot plasma and create the conditions ...

As its name suggests, the company is building a tokamak reactor, the most common kind of fusion design, first pioneered in the 1960s. Tokamaks use giant magnets to keep plasma moving in a loop ...

It’s all in the shape. Most of the active fusion reactor experiments around the world are tokamaks, but OpenStar’s is not. A tokamak is a toroidal (donut-shaped) chamber where a stream of ...

The findings may have implications for tokamak fusion reactors, though the researchers caution that their plasma is not directly comparable to that in a fusion reactor. Nearly 40 years ago, Martin ...

The company announced Tuesday that it had raised $125 million to continue development of the reactor design and expand its TE Magnetics division. Tokamak Energy has been working on fusion since ...

The need for limitless, clean energy has pushed scientists to explore efficient fusion reactor designs. Now, the world’s most ...

The latest exhibit: Tokamak Energy, a U.K.-based startup that’s working to refine its squeezed-doughnut approach to fusion power. The company announced Tuesday that it had raised $125 million to ...